A 5-mm-thick stainless steel strip (k = 21 W/m·K, ρ = 8000 kg/m³, and c_p= 570 J/kg·K) is being heat treated as it moves through a furnace at a speed of 1 cm/s. The air temperature in the furnace is maintained at 900°C with a convection heat transfer coefficient of 80 W/m²·K. If the furnace length is 3 m and the stainless steel strip enters it at 20°C, determine the temperature of the strip as it exits the furnace.

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Furnace 900°C 1 cm/s 3 m Stainless steel 20°C